Which formula represents Ohm's Law?

The formula that accurately represents Ohm's Law is expressed as E = IR, where E stands for voltage (electromotive force), I represents the current flowing through the circuit, and R is the resistance. This fundamental principle of electricity demonstrates the relationship between voltage, current, and resistance in a circuit.

Ohm's Law is crucial because it allows us to calculate one of the three quantities if the other two are known. For instance, if you know the voltage and resistance in a circuit, you can determine the current flowing through it by rearranging the formula to I = E/R. This relationship is essential in electrical engineering and circuit design as it helps in understanding how different components in a circuit will behave under various conditions.

The other formulas listed pertain to different aspects of electrical theory: P = IV relates to power where P represents power in watts, C = Q/V corresponds to capacitance, and they each represent different concepts within electrical engineering but do not describe the fundamental relationship delineated by Ohm's Law.